I thought one of the water sources was aerated.

Thinking out loud here. If water is not aerated then you could put the sprayer (sweeper nozzles) near the surface so the cold aerated water would sink over the pipe length or you could submerge it so that it sprays directly over the air stream from the diffuser or you could put an air line into the head of the pipe or into the sweeper nozzle pipe T. What kind of pressures are on the well flow lines ?